What is this style called? Why are girls dressing like this?

Why are some girls dressing like this? Are they trying to be different or? I have absolutely nothing against this style. I think it's quite pretty but it really does intrigue me. I don't understand the obsession with the evian waterbottles, holographic items, pale clothing and the clothing they wear is only and mainly American apparel, chokers, Angels, I just don't get it. For example, check out this girls pictures to understand